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How do you handle “that that”? The double “that” problem

Is there something wrong with this sentence?

"I don't think that that can be done."

It sounds odd to me. Would it be better if I'd use just one "that" instead of two:

"I don't think that can be done."

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marked as duplicate by Marthaª, F'x, RegDwigнt Mar 19 '11 at 17:27

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Related: Use of "that" in a sentence. – kiamlaluno Mar 18 '11 at 9:44
Maybe "I don't think it can be done" could be used instead. Any time you have the same two words next to each other you start to confuse people. (despite the fact that that's syntactically correct) – advs89 Mar 18 '11 at 15:25
@advs89: Sometimes it confuses people, but not always. Sometimes, having two words in a row can show when you are really really emphatic about something. – Kosmonaut Mar 18 '11 at 16:36
@Kosmonaut: very very true – advs89 Mar 18 '11 at 16:39
up vote 7 down vote accepted

Both are correct, but the second is preferred.

In option 1, the first that serves as a conjunction introducing the subordinate clause "that can be done," which is the object of the verb think. The second that is simply a pronoun substituting for the subject of the subordinate clause.

Option 2 is better because (1) it avoids the awkwardness of the double that and (2) the sentence is still perfectly intelligible without the conjunctive that.

That is quite a flexible word. :)

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Ok, thanks :) – Šime Vidas Mar 18 '11 at 3:30
"the second is preferred" by who? – nohat Mar 18 '11 at 5:57
Possibly by those who use phrases like 'the second is preferred' :D – Sudhir Jonathan Mar 18 '11 at 9:37
I don't think that that can be a gerund‌​. Can it? It's something I've never heard of. Can you link this to a source? – Tragicomic Mar 18 '11 at 10:28
@Tragicomic: I didn't say that was a gerund. – Kelly Hess Mar 18 '11 at 14:04

In that sentence, that can be omitted, similarly to what is done in the following sentences.

He will understand I was not joking.
Several people read the question you wrote.
I am sure you will be able to resolve the issue.

I would write the sentence avoiding to write that twice, but that doesn't mean it is wrong to write "that that."

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Although both are grammatically correct, the second one is quite natural. I said natural because, native speakers spontaneously use the second form. In linguistics, this phenomenon is called as the competence - native speakers intuitively choose the second sentence because, they know (naturally) that the first sentence would sound awkward.

Anyone using a sentence similar to the first one is undoubtedly a non-native speaker! This condition will be vanished once the non-native speakers start socializing with native speakers.

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